Computer Sciences MCQs Chapter 9 Class 12

Computer Sciences MCQs Class 12: Boost Your Problem-Solving

Computer Sciences MCQs Class 12 are essential for students preparing for NUST, UET, FAST, ECAT, NTS, and FSC board exams. These MCQs help students practice regularly, strengthen logic, and develop coding skills.

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Created on February 22, 2023 By Ali Durrani

Computer Sciences Ch 9 Class 12

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is not a valid variable

6_XYZ

roll no

XYZ

ABC

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How many keywords are in C?

100

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4. When the result of the computation of two very small numbers is too small to be represented, this phenomenon is called:

Arithmetic overflow

Arithmetic underflow

Truncation

Round off

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20. elements of program in not token:

keyword

string constant

variable

comment

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A quantity whose value cannot change during execution of

constant

keyword

variable

token

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18. a b is equivalent to

b -F= a

a =+ b

a=a+b

b=b-Fa

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10. The symbol = represents:

Comparison operator

Equal to operator

Assignment operator

None of these

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17. The logical not (!) operator is denoted as:

Ternary operator

Unary operator

Binary operator

Bitwise operator

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19. The words used to write the statements of a program are called

Special Words

Words

Keywords

Alphabets

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2. Which of the following is a valid character constant?

"b"

'6'

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5. The predefined words of the programming language that are used for special purposes in the source program are called:

Keywords

Statements

Special words

Alphabet

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1. Variables are created in

RAM

ROM

HARD DIS

CACHE

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13. is valid variable name

2-S

S-2

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15. In C, the maximum length of variable name is:

256

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11. Which of the operator has lowest presidence

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3. Which of the data type offers the highest precision?

float

long int

long double

unsigned long int

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14. Which of the following characters cannot be used as first character of a variable name?

18 / 20

. A quantity whose value may change during execution of program is called:

Constant

string constant

variable

token

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12. Relational operators are used to

Establish a relationship among variables

Compare two values.

Construct compound condition

Perform arithmetic operations.

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16. C is a strongly typed language, this means that:

Every program must be compiled before execution

Every variable must be declared before it is being used

The variable declaration also defines the variable

Sufficient data types are available to manipulate each type of data

Your score is

The average score is 71%

Benefits of Practicing

Practicing these MCQs allows students to identify weak areas, enhance analytical skills, and improve time management. It also boosts confidence and exam readiness.

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